Let me start with the most important thing, location, which is excellent - 8-10 mins' walk to the sky train (equivalent to metro) station; practically part of the station is Sathorn, Bangkok's main pier, from which you have cheap and fast access to all Chao Praya river piers. Also, frequent buses can take you to any part of Bangkok.
The studio itself is clean, safe and very quiet with all the necessary amenities. Wi-fi signal is immaculate and full access to Netflix is a welcome addition.
The only minuses were that (for me) the bed is on a hard side and TV-watching double sofa is rather worn out.
Sujira was always reachable and promptly responded to a couple of queries and requests.
To conclude, we enjoyed our stay a lot and we'll be back in no time. What a great value for money this studio is!